6533b7d3fe1ef96bd1260c96
RESEARCH PRODUCT
Photocontrolled On-Surface Pseudorotaxane Formation with Well-Ordered Macrocycle Multilayers.
Rakesh PuttreddyAndreas LippitzThomas HeinrichThomas HeinrichJ. Ole KaufmannWolfgang E. S. UngerKari RissanenFelix B. SchwarzChristoph A. Schalleysubject
Supramolecular chemistryTetralactam macrocyclesurface chemistry02 engineering and technology010402 general chemistryLinear dichroismPhotochemistry01 natural sciencessupramolecular chemistryCatalysischemistry.chemical_compoundSpectroscopyta116pseudorotaxanesphotochemistryOrganic ChemistryGeneral Chemistry021001 nanoscience & nanotechnologyXANES0104 chemical sciencesazobenzeneAzobenzenechemistryNexafs spectroscopySelf-assembly0210 nano-technologydescription
The photoinduced pseudorotaxane formation between a photoresponsive axle and a tetralactam macrocycle was investigated in solution and on glass surfaces with immobilized multilayers of macrocycles. In the course of this reaction, a novel photoswitchable binding station with azobenzene as the photoswitchable unit and diketopiperazine as the binding station was synthesized and studied by NMR and UV/Vis spectroscopy. Glass surfaces have been functionalized with pyridine-terminated SAMs and subsequently with multilayers of macrocycles through layer-by-layer self assembly. A preferred orientation of the macrocycles could be confirmed by NEXAFS spectroscopy. The photocontrolled deposition of the axle into the surface-bound macrocycle-multilayers was monitored by UV/Vis spectroscopy and led to an increase of the molecular order, as indicated by more substantial linear dichroism effects in angle-resolved NEXAFS spectra.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-07-01 | Chemistry (Weinheim an der Bergstrasse, Germany) |